Users cannot be removed from the Project Roles if the user is renamed in JIRA 8.2.0

Issue Summary

If we rename a user in Jira 8.2.0, add a renamed user in a project role, Jira won't allow the user to be removed from the project role. Based on our observation, adding the users in the project role inserts jira (user_key) value of the user in the projectroleactor table
app_user

projectroleactor

however, removing the user, JIRA tries to look for jira123 which is the lower_user_name in the projectroleactor table. In the above example, since it was jira (user_key) that has been inserted in the projectroleactor table, jira123 (lower_user_name) is nowhere to be found. Thus, JIRA does not allow this user to be removed from the project role.

Environment

Jira 8.2.0

Steps to Reproduce

1. Create a user in Jira
2. Rename the user
3. Add the user in any project role
4. Attempt to remove the user from the project tole

Expected Results

The user will be removed from the project role

Actual Results

Nothing happens.

Workaround

Execute the following REST endpoint to delete the user from the role: Delete actor

/rest/api/2/project/{projectIdOrKey}/role/{roleId}?user={username}

Note

Tested in JIRA 8.0 and the bug can't be reproduced